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Re:Hogwatch – a bandwidth monitor that shows per process net... by heywire on Saturday April 30, 2016 @09:49AM (#11601676)
Somewhat on topic, anyone know of something like Little Snitch for Linux?
Re:Hogwatch – a bandwidth monitor that shows per process net... by aroch on Saturday April 30, 2016 @10:22AM (#11601789)
There's LeopardFire: https://github.com/themighty1/lpfw

IIRC, it is the most recently active project. As far as I can tell, the whole user-facing, interactive firewall program never really caught on in linux land.